Eclipse updating archives model
Java Web Apps are fully managed so you can focus on building, deploying and scaling enterprise-grade apps in seconds.Java Web apps run on either Tomcat or Jetty by default, but can be configured for other app servers as well. This is especially great when you want to deploy your Java code to a fully managed, scalable platform on Azure with minimal configuration hassle.This page provides an overview of the different repositories maintained by the Eclipse project, and their corresponding location and retention policy. See the online help article Adding a new software site for instructions on how to add a new update site to your Eclipse installation. To save space on mirror servers for rarely requested downloads only about 2 of the most recent milestones will be kept on "downloads" server, older ones may be moved to "archives", temporarily, until formal release, when they are removed completely.Note, all milestone builds and release candidates, except the last one, are removed approximately one week before a formal release date, to free up space on and mirror servers.So, deleting the .settings folder would have resolved the Maven error, but I wanted to keep some of my local configuration files.I resolved the conflict, then tried a Maven update again and it worked. Null Pointer Exception at com.google.appengine.maven. Gae Runtime Gae Runtime(Gae Runtime Manager.java:85) at com.google.appengine.maven.Apparently I had at some point launched eclipse from an administrator console by mistake.
Last 7-days I-builds are retained along with every weeks Monday's I-builds till milestone is available; they will be removed once a milestone is available.In my case, the problem was a conflict of derived dependencies that were been used by other dependencies, and some of those derived dependencies versions were not available, maybe because some deploy that i forgot to do because with workspace resolution everything worked, but when moving to other environment all broke suddenly.Today at Eclipse Con 2016 Microsoft announced it joined the Eclipse foundation.I'm using STS and the only thing that worked was to go into my STS directory and add a "-clean" to the top of the file.You can then start up your workspace and run maven clean without errors.
You can download archived versions of the update sites, if you want to install STS 3 into an existing Eclipse installation or if you want to update an existing STS 3 installation without accessing the hosted version of the update repository.